diff --git a/src/component/index.vue b/src/component/index.vue
index bd0d716b8d5cab1741c42d39b569a6134e1f360d..1be72e7240fceac20818a712b41bc8c6660f587b 100644
--- a/src/component/index.vue
+++ b/src/component/index.vue
@@ -10,7 +10,7 @@ import Iframe from "./Iframe.vue";
 import Title from "./Title.vue";
 import CloseBtn from "./CloseBtn.vue";
 import Resize from "./Resize.vue";
-import { Ref, ref, watch, computed, useSlots, VNodeTypes, nextTick } from "vue";
+import { Ref, ref, watch, computed, useSlots, VNodeTypes, nextTick, inject } from "vue";
 import {
   nextId,
   maxArea,
@@ -28,6 +28,7 @@ import {
 } from "../utils";
 import useMove from "../composable/useMove";
 import useResize from "../composable/useResize";
+import { zIndexKey } from "../tokens";
 
 const slots = useSlots();
 const layero = ref<HTMLElement | null>(null);
@@ -70,7 +71,6 @@ export interface LayModalProps {
 
 const props = withDefaults(defineProps<LayModalProps>(), {
   title: "信息",
-  zIndex: 99999,
   setTop: false,
   offset: () => ["50%", "50%"],
   area: "auto",
@@ -104,7 +104,7 @@ const type: number = calculateType(props.type);
 const area: Ref<string[]> = ref(calculateArea(props.type, props.area, props.offset));
 const offset: Ref<string[]> = ref(calculateOffset(props.offset, area.value, props.type));
 const contentHeight = ref(calculateContent(area.value[1], props.btn, type, props.isMessage));
-const index: Ref<number | Function> = ref(props.zIndex);
+const index: Ref<number | Function> = ref(props.zIndex ?? inject(zIndexKey, 99999)) ;
 const visible: Ref<boolean> = ref(false);
 const first: Ref<boolean> = ref(true);
 
diff --git a/src/index.ts b/src/index.ts
index cd102489e4f7a6266d1f79a1b90eb58e60e9c8d5..df9de7c3a8836f1da3791593b18eadb328d014af 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,6 +1,7 @@
 import { render, h, isVNode, getCurrentInstance, AppContext, App } from "vue";
 import LayLayer from "./component/index.vue";
 import { InstallOptions } from "./types";
+import { zIndexKey } from "./tokens";
 import { nextId } from "./utils";
 
 // 实例队列
@@ -201,6 +202,7 @@ const layer = {
 // 全局安装
 const install = (app: App, options: InstallOptions): void => {
   layer._context = app._context;
+  app.provide(zIndexKey, options.zIndex)
   app.component(LayLayer.name, LayLayer);
   app.config.globalProperties.$layer = layer;
 };
diff --git a/src/tokens/index.ts b/src/tokens/index.ts
new file mode 100644
index 0000000000000000000000000000000000000000..6990b21a148f63cc3f6c733136f98bb3e3545fc9
--- /dev/null
+++ b/src/tokens/index.ts
@@ -0,0 +1 @@
+export const zIndexKey = Symbol("zIndex");
\ No newline at end of file
diff --git a/src/types/index.ts b/src/types/index.ts
index 45bda30aa57cf6ea13e18a705c656d1d05e6ff7c..5efc8b68b9dac45592f1c83f256b64da3e76b35a 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -1,3 +1,3 @@
 export type StringObject = Record<string, unknown>;
 
-export interface InstallOptions extends StringObject {}
\ No newline at end of file
+export interface InstallOptions extends StringObject {}; 
\ No newline at end of file